<template>
	<view class="">
		<view class="search-box">
			<uni-search-bar @input="input" :radius="100" cancelButton="none"></uni-search-bar>
		</view>
		
		<!-- 搜索建议列表 -->
		<view class="sugg-list" v-if="searchResultList.length !== 0">
			<view class="sugg-item" v-for="(item,index) in searchResultList.goods" :key="index" @click="gotoDetail(item)">
				<view class="goods-name">{{item.goods_name}}</view>
				<uni-icons type="right" size="16"></uni-icons>
			</view>
		</view>
		
		<!-- 搜索历史 -->
		<view class="history-box" v-else>
			<!-- 标题区域 -->
			<view class="history-title">
				<text>搜索历史</text>
				<uni-icons type="trash" size="17" @click="clean"></uni-icons>
			</view>
			<!-- 列表区域 -->
			<view class="history-list">
				<uni-tag :text="item" v-for="(item,index) in histories" :key="index" @click="gotoGoodsList(item)"></uni-tag>
			</view>
		</view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				timer:null,
				kw:'',
				//搜索的结果列表
				searchResultList:[],
				//搜索的历史记录
				historyList:[]
			};
		},
		onLoad() {
			this.historyList = JSON.parse(uni.getStorageSync('kw')||[]);
		},
		computed:{
			histories(){
				return [...this.historyList].reverse()
			}
		},
		methods:{
			//跳转到商品列表页面
			gotoGoodsList(kw){
				uni.navigateTo({
					url:'/subpkg/good_list/good_list?query='+kw
				})
			},
			//清空历史记录
			clean(){
				this.historyList = [];
				uni.setStorageSync('kw',[])
			},
			//点击事件
			gotoDetail(data){
				uni.navigateTo({
					url:'/subpkg/good_detail/good_detail?goods_id='+data.goods_id
				})
			},
			//input输入事件处理函数
			input(e){
				clearTimeout(this.timer)
				this.timer = setTimeout(()=>{
					this.kw = e;
					this.getSearchList();
				},500)
			},
			async getSearchList(){
				//判断搜索关键字是否为空
				if(this.kw.length === 0){
					this.searchResultList = [];
					return;
				}else{
					const {data:res} = await uni.$http.get('/api/public/v1/goods/search',{query:this.kw})
					if(res.meta.status !== 200){
						return uni.$showMsg();
					}else{
						this.searchResultList = res.message;
						this.saveSearchHistory();
					}
				}
			},
			saveSearchHistory(){
				//this.historyList.push(this.kw);
				const set = new Set(this.historyList);
				set.delete(this.kw);
				set.add(this.kw);
				this.historyList = Array.from(set);
				//对搜索历史数据进行持久化储存
				uni.setStorageSync('kw',JSON.stringify(this.historyList))
			}
		}
	}
</script>

<style lang="scss">
	.search-box{
		position: sticky;
		top: 0;
		z-index: 999;
	}
	.sugg-list{
		padding: 0 5px;
		.sugg-item{
			display: flex;
			justify-content: space-between;
			align-items: center;
			font-size: 12px;
			padding: 13px 0;
			border-bottom: 1px solid #efefef;
			.goods-name{
				white-space: nowrap;
				overflow: hidden;
				text-overflow: ellipsis;
				margin-right: 3px;
			}
		}
	}
	.history-box{
		padding: 0 5px;
		.history-title{
			display: flex;
			justify-content: space-between;
			height: 40px;
			align-items: center;
			font-size: 13px;
			border-bottom: 1px solid #efefef;
		}
		.history-list{
			display: flex;
			flex-wrap: wrap;
			.uni-tag{
				margin-top: 5px;
				margin-right: 5px;
			}
		}
	}
	
	
</style>
